#include <bits/stdc++.h>
#define mp make_pair
#define all(vec) vec.begin(), vec.end()
using namespace std;
using ll = long long;
using P = pair<ll, ll>;
const ll INF = 1LL << 30;
const ll LINF = 1LL << 60;
const double eps = 1e-9;
const ll MOD = 1000000007LL;
int main() {
    int n;
    cin >> n;
    vector<int> co(n);
    for(int i = 0; i < n - 1; i++) {
        int a, b;
        cin >> a >> b;
        --a;
        --b;
        co[a]++;
        co[b]++;
    }
    int ans = 0;
    for(int i = 0; i < n; i++) {
        ans += max(0, co[i] - 2);
    }
    cout << ans << endl;
}